107 lines
1.6 KiB
PHP
107 lines
1.6 KiB
PHP
kbd_read:
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push ecx edx
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mov ecx,0xfffff ; last 0xffff, new value in view of fast CPU's
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kr_loop:
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in al,0x64
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test al,1
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jnz kr_ready
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loop kr_loop
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mov ah,1
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jmp kr_exit
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kr_ready:
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in al,0x60
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xor ah,ah
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kr_exit:
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pop edx ecx
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ret
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kbd_write:
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push ecx edx
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mov dl,al
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mov ecx,0x1ffff
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@@:
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in al,0x64
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test al,2
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jz @f
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loop @b
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mov ah,1
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jmp .nothing
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@@:
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mov al,dl
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out 0x60,al
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mov ah,0
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.nothing:
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pop edx ecx
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ret
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kbd_cmd:
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mov ecx,0x1ffff ; last 0xffff, new value in view of fast CPU's
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c_wait:
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in al,0x64
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test al,2
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jz c_send
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loop c_wait
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mov ah,1
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jmp c_exit
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c_send:
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mov al,bl
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out 0x64,al
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xor ah,ah
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c_exit:
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ret
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mouse_cmd:
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mov [mouse_cmd_byte], al
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mov [mouse_nr_resends], 5
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.resend:
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mov bl, 0xd4
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call kbd_cmd
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cmp ah,1
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je .fail
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mov al, [mouse_cmd_byte]
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call kbd_write
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cmp ah, 1
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je .fail
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call mouse_read
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cmp al, 0xFA
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jne .noack
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clc
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ret
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.noack:
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cmp al, 0xFE ; resend
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jne .noresend
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dec [mouse_nr_resends]
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jnz .resend
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.noresend:
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.fail:
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stc
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ret
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mouse_read:
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mov [mouse_nr_tries], 100
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.repeat:
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call kbd_read
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cmp ah, 1
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jne .fin
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mov esi, 10
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invoke Sleep
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dec [mouse_nr_tries]
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jnz .repeat
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stc
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ret
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.fin:
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clc
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ret
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